Quickly Showing a Hidden OS X Dock

A friend of mine for years has been searching for a way to instantly show his
auto-hidden dock, with zero delay. Until he recently discovered the trick to
removing the delay and shared it with me I could not understand why
he cared so much.

How to do it

To remove the delay from your hidden OS X dock, enter the following on the
command line:

defaults write com.apple.Dock autohide-delay -float 0 && killall Dock

Reverting

To undo the change and go back to the default auto-hide option with the slight
delay, you can just use defaults delete like so:

defaults delete com.apple.Dock autohide-delay && killall Dock

Conclusion

I thought it was pretty useless until I tried it myself. It makes a huge
difference. The only down side to it is having the dock show up when I
occasionally bump into the screen edge by accident, which isn’t very often at
all.